Which of the following is correct for C ( g r a p h i t e ) + O 2 ( g a s ) → C O 2 , heat = - 348 kJ?

Mass of product = Mass of reactant

Mass of product < Mass of reactant

Mass of product > Mass of reactant

EASY

Earn 100

$8 l i t r e o f H_{2}$ and $6 l i t r e o f C l_{2}$ are allowed to react to maximum possible extent. Find out the final volume of reaction mixture. Suppose $P a n d T$ remains constant throughout the course of reaction.

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Important Questions on Some Basic Concepts of Chemistry

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

The statement related to law of definite proportions is

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Which of the following have same number of significant figures?
(A)

0.00253

(B)

1.0003

(C)

15.0

(D)

163

Choose the correct answer from the options given below

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

56.0 L

of nitrogen gas is mixed with excess of hydrogen gas and it is found that

20 L

of ammonia gas is produced, The volume of unused nitrogen gas is found to be_____

L

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

A bicycle tyre is filled with air having pressure of

270 kPa

27 ° C

. The approximate pressure of the air in the tyre when the temperature increases to

36 ° C

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Among the following pairs of compounds, the one that does not illustrate the law of multiple proportions, is

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

By heating

200 g

of metal carbonate,

112 g

of metal oxide on a gaseous compound are produced. Vapour density of the gaseous compound is

22

. How many moles of gaseous compound is produced in the reaction?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Which of the following is an example of Law of multiple proportion?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

The percentage of copper and oxygen in samples of CuO obtained by different methods were found to be the same. This illustrates the law of.

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

State the law of multiple proportions.

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

The mass of nitrogen per gram hydrogen in the compound hydrazine is exactly one and half times the mass of nitrogen in the compound ammonia. The fact illustrates the

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

0.75

moles of a solid

A_{4}

and

2

moles of

O_{2} (g)

are heated in a sealed vessel, completely using up the reactants and produces only one compound. It is found that when half the temperature is used to initial temperature, the products of the vessel exhibit a pressure equal to

\frac{1}{2}

of the original pressure. The formula of the product will be

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

State the law of multiple proportions.

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

One gram mole of a gas at NTP occupies 22.4 L. This fact was derived from

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Avogadro's hypothesis states that

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Which of the following is correct for

C (g r a p h i t e) + O_{2} (g a s) \to C O_{2}

, heat =

-

348 kJ?

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

How many g atoms of S are present

i n 4.9 g H_{2} S O_{4}

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

One part of an element

A

combines with two parts of another element

B

. 6 parts of element

C

combines with 4 parts of

B

. If

A

and

C

combine together, the ratio of their weights, will be governed by

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Carbon combines with oxygen to form two oxides. The carbon content in one of the oxides is

42.9 %

while in the other oxide it is

27.3 %

. Show that these data are in agreement with the law of multiple proportions.

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

Number of molecules in 100 mL of each of

O_{2}

N H_{3}

and

C O_{2}

at STP are in the order:

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Laws of Chemical Combination

n

gram of a substance

X

reacts with

m

gram of substance

Y

to form

p

gram of substance

R

and

q

gram of substance

S

. This reaction can be represented as follows

X + Y = R + S

The relation which can be established in the amounts of the reactants and the products will be

8 litre of H2 and 6 litre of Cl2 are allowed to react to maximum possible extent. Find out the final volume of reaction mixture. Suppose P and T remains constant throughout the course of reaction.

Important Questions on Some Basic Concepts of Chemistry

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$8 l i t r e o f H_{2}$ and $6 l i t r e o f C l_{2}$ are allowed to react to maximum possible extent. Find out the final volume of reaction mixture. Suppose $P a n d T$ remains constant throughout the course of reaction.